CVE-2026-2329: Grandstream Gxp1610 Firmware remote code execution (CVSS 9.8)

Description

An unauthenticated stack-based buffer overflow vulnerability exists in the HTTP API endpoint /cgi-bin/api.values.get. A remote attacker can leverage this vulnerability to achieve unauthenticated remote code execution (RCE) with root privileges on a target device. The vulnerability affects all six device models in the series: GXP1610, GXP1615, GXP1620, GXP1625, GXP1628, and GXP1630.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Grandstream Gxp1610 Firmware< 1.0.7.81

Grandstream Gxp1615 Firmware< 1.0.7.81

Grandstream Gxp1620 Firmware< 1.0.7.81

Grandstream Gxp1625 Firmware< 1.0.7.81

Grandstream Gxp1628 Firmware< 1.0.7.81

Grandstream Gxp1630 Firmware< 1.0.7.81

Remediation

Fixed in

Grandstream Gxp1610 Firmware≥ 1.0.7.81

Grandstream Gxp1615 Firmware≥ 1.0.7.81

Grandstream Gxp1620 Firmware≥ 1.0.7.81

Grandstream Gxp1625 Firmware≥ 1.0.7.81

Grandstream Gxp1628 Firmware≥ 1.0.7.81

Grandstream Gxp1630 Firmware≥ 1.0.7.81

Patch & vendor advisories

References

https://firmware.grandstream.com/Release_Note_GXP16xx_1.0.7.81.pdfProductRelease Notes
https://github.com/rapid7/metasploit-framework/pull/20983PatchVDB Entry
https://psirt.grandstream.com/Vendor Advisory
https://www.rapid7.com/blog/post/ve-cve-2026-2329-critical-unauthenticated-stack-buffer-overflow-in-grandstream-gxp1600-voip-phones-fixedThird Party AdvisoryVDB Entry

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-2329 being actively exploited?

CVE-2026-2329 is not in the CISA KEV catalog. Its EPSS exploit probability is 40.6%.

How severe is CVE-2026-2329?

CVE-2026-2329 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 40.6% probability of exploitation.

Which products are affected by CVE-2026-2329?

Affected products include Grandstream Gxp1610 Firmware, Grandstream Gxp1615 Firmware, Grandstream Gxp1620 Firmware, Grandstream Gxp1625 Firmware, Grandstream Gxp1628 Firmware, and 1 more.

How do I fix CVE-2026-2329?

Upgrade affected software to a fixed version, for example Grandstream Gxp1610 Firmware 1.0.7.81, Grandstream Gxp1615 Firmware 1.0.7.81, Grandstream Gxp1620 Firmware 1.0.7.81 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-2329 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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